Sore Hips During Marathon Training? Your Spine Might Be the Culprit

Every spring, as Vancouver's running community ramps up mileage for the Sun Run and the BMO Marathon, I start seeing a familiar pattern in the clinic. Runners come in describing hip soreness, a deep ache at the outside of the hip, or a nagging pain in the front pocket area, that began four to six weeks into their training build. They have stretched their hip flexors diligently. They have done their glute activation exercises. The soreness persists.

When I assess these patients, I often find the same thing: the hip is not the primary problem. The lumbar spine is. Sore hips after marathon training frequently originate several segments higher than where the pain is felt, and treating only the hip means you are addressing the symptom while the cause continues to compound.

The Spine-Hip Connection

The L4 and L5 nerve roots exit the lumbar spine and travel directly into the structures that control hip flexion and hip stability. When these vertebrae are compressed, which happens progressively as marathon training mileage climbs, the nerve roots can become irritated. That irritation can manifest as hip pain, hip flexor tightness, or altered muscle recruitment patterns that change how force is transmitted through the hip joint with every stride.

Simultaneously, the sacroiliac joint, the junction between the lumbar spine and the pelvis, is directly affected by lumbar compression. When the L5-S1 segment loses disc height, the SI joint shifts its load-bearing relationship. Runners with sore hips during marathon training often have SI joint dysfunction as the proximate cause, even though the upstream driver is lumbar compression.

Why the Mileage Build Is the Trigger

At low training volumes, the lumbar spine can usually absorb the compressive load of running without producing symptoms. As mileage climbs, say, from 40 kilometres per week to 60 or 70 during a BMO Marathon build, the cumulative compression exceeds the disc's capacity to recover between sessions. The disc height decreases measurably. The nerve root space narrows. The SI joint begins to compensate. And at some point during a tempo run or a long slow run, the hip starts to complain.

This timing, roughly four to six weeks into a serious build, is predictable enough that I now proactively recommend decompression sessions for marathon runners at that stage of training, before sore hips after marathon training become a problem that interrupts the schedule.

What Works: Treating the Source, Not the Site

The most effective approach I have found for marathon training hip soreness is to decompress the lumbar spine first. By restoring disc height at L4-L5 and L5-S1, we reduce the nerve root irritation that is driving the hip pain. The SI joint mechanics normalise as the upstream load shifts. Runners typically notice that the hip soreness diminishes significantly within two to three sessions, not because we have done anything to the hip, but because we have addressed the root cause.

Roller massage targeting the thoracolumbar fascia, glutes, and iliotibial band then addresses the secondary tissue tension that has built up in response to the altered movement patterns. This combined approach keeps the lumbar spine healthy enough to sustain high-mileage training, and it keeps the hips functioning as hips rather than as symptom generators for a compressed spine.

Training Smart Through the Build

My recommendation for anyone training for the Vancouver Sun Run or the BMO Marathon with a history of hip soreness: don't wait for the problem to arrive. Start a proactive decompression protocol at week three or four of your build. One session per week during the peak training phase, backed by diligent mobility work at home, is usually enough to keep your spine healthy and your hips out of the picture.

Sore hips after marathon training are common, but they are not inevitable. If you train smart and address the structural cause, you can build confidently to race day without the hip soreness that derails so many well-intentioned training blocks.